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igal2(1) |
Version 2.2 |
igal2(1) |
igal2 - online Image GALlery generator
igal2 [-option1 -option2 ...]
igal2 is a quick and easy program for placing your images online with
just one command-line invocation. It generates a pretty good-looking set of
W3-compliant static HTML slides even with its default settings. To try it out
just run igal2 in a directory with jpg, gif or png
files and check the output in a web browser. You can adjust the appearance of
the image gallery with the many options listed below or (if you know a bit of
HTML) by modifying the .indextemplate.html, .slidetemplate.html
and igal2.css files that igal2 creates in your image
directory. igal2 also checks for the existence of a $HOME/.igal2
directory where users can store their own templates, overriding the site-wide
/usr/local/lib/igal2.
igal2 needs Perl to run and it also relies on a few
other programs that come standard with most Linux distributions. It relies
on the ImageMagick package first if available, otherwise it falls
back onto cjpeg/djpeg/pnmscale for processing
jpg files. The command convert of the ImageMagick
package is required to process gif and png files and the
identify command enables igal2 to include IMG HEIGHT and WIDTH
tags in the HTML it generates.
IfyouwouldliketoshowtheEXIFheadersoftheimages
(option -e) Image::ExifTools is needed
- -a
- Write image dimensions and sizes under each thumbnail on the index page.
This only works if the ImageMagick command identify is
present.
- --ad
- Like -a but write only the image dimensions.
- --as
- Like -a but write only the image sizes.
- --bigy <n>
- Like -y but operates on the image slides, not the thumbnails.
Scales image slides to some medium height (e.g. 400), adjusting
their width accordingly. Useful if your digital camera spits out large
images, like 1600x1200. The originals aren't affected, but scaled copies
of your images are stored with the .slide prefix and thumbnails
link to these copies. Clicking on the scaled copies in the HTML slides
lets users see the full unscaled images. You must use -f between
two consecutive runs when you've changed the value of --bigy.
- -c
- First generate and then publish image slide captions. The first invocation
of igal2 -c generates a .captions file that you may edit.
The format of this file is very simple. You should only have to enter your
captions after the ---- separator. You may rearrange the image
order at this point and also leave out some pictures by simply placing a
pound (#) sign at the beginning of their respective lines. A second
invocation of igal2 -c will read your .captions file,
include your captions in the slides and rearrange them if necessary.
- -C
- Like -c but preserve file names as captions when generating the
.captions file (strips file name suffix).
- --con options
- Command line options to pass on to convert or cjpeg
internally (see their man pages). This affects all thumbnails and, if
--bigy is given, the medium-size slides too. You can set the
-quality or go crazy with -negate, -noise, etc. (the
last two only work with convert if ImageMagick is
installed.
- -d <dir>
- Operate on image files in directory <dir>, which is also
where the HTML and thumbnail files will be generated. The default is the
current directory.
- -e
- Extract all EXIF tags from the images and display them on the image
slides. This option needs Image::ExifTool to be installed
- -f
- Force thumbnail regeneration. Also forces medium-slide regeneration if
--bigy is given. Otherwise igal2 will not regenerate these
files if they already exist, and you may end up with stale copies.
Definitely use -f between two runs where you've changed the value
of --bigy or --con.
- -h
- Display brief help, same as --help.
- --help
- Display brief help, same as -h.
- -i <file>
- Name of the main thumbnail index file. The default is index.html,
as desirable for most web servers.
- -k
- Use the image captions for the HTML slide titles. The default behavior is
to use the image names.
- -m <watermarkfile>
- Add a watermark to each file. The parameter specified is another image
file which will be overlayed in the top left of the image with some
transparency applied. This option requires ImageMagick. The original
images will be left in place with a '.unmarked' extension. You may wish to
delete those afterwards. If this option is specified on two consecutive
runs, igal2 will detect the .unmarked versions and not run it through the
watermarking process again. Transparent GIF files work well for this
option.
- -n
- Use the image file names for the HTML slide files. Otherwise the default
behavior is to simply name your slides 1.html, 2.html, and
so on.
- -o <URL>
- Use this option if you are hosting the index files in a different location
(e.g. a different server) from the back end images/slides. This option
adds the specified prefix into the URLs of the slides. If you use this
option, remember that until you move the files into the resulting
location, the gallery won't work properly.
- -p <n>
- The cellpadding value of the thumbnail index tables. The default is
3.
- -r
- Omit the film reel effect altogether. For a simpler look you can also set
the thumbnail background to be the same as the main index page background
with the tile background-color option in the igal2.css file.
- -s
- For the simplest setup, omit all HTML slides. Clicking the thumbnails on
the main page will just take users to the plain image files.
- -t <n>
- Height (in pixels) of the tiled image used to simulate the top and bottom
"film reel" effect on the thumbnail index page. This is 21 for
the default .tile.png image used, but you should set it otherwise
if you replace that file with your own design.
- -u
- Write image captions under each thumbnail on the index page. If you have a
.captions file (see options -c or -C) then the captions are read
from there, else the file names are used (but the file extension is
stripped).
- --pagination <n>
- Maximum number of images on one page. If the given number of images is
reached a new page is started. Pagination number n should be a multiple of
parameter -w (default 5). Default 0 - means no pagination at all.
- -w <n>
- Set the thumbnail rows to be <n> images wide in the main
index file. Default is 5.
- -x
- Omit the image count from the captions.
- -y <n>
- Scale all thumbnails to the same height of <n> pixels. The
default is 75 pixels.
- --xy <n>
- Scale thumbnails to <n> pixels along their longest dimension.
This value is passed to pnmscale and only works properly for
jpg images.
- --www
- Make all igal2 files world-readable.
- --dest <dir>
- Per default igal2 places all igal2 helper files (thumbnails, slidefiles,
CSS, etc) in the directory where the image files reside. With this option
these files can be placed in a subdirectory of the image directory.
- --AddSubdir
- If igal2 finds subdirectories below your image directory it will add links
to this directories in the index.html file. This is useful if you've a
tree of image directories.
Example:
!
+ Vacation_Vienna (Image Directory)
!
+ .igal2-stuff (igal2 helper files)
+ Videos
+ Documents_of_interest
igal2 -d Vacation_Vienna --dest .igal2-stuff --AddSubdir
will put all helper files in .igal2-stuff, and generate links
to the subdirectories "Videos" and
"Documents_of_interest" in the index.html file.
Note: igal2 will not work recursively, it just adds HREF links
to the found directories.
/usr/local/lib/igal2/indextemplate2.html
The default index template file.
/usr/local/lib/igal2/slidetemplate2.html
The default file used to generate slides.
/usr/local/lib/igal2/igal2.css
The default style sheet template.
/usr/local/lib/igal2/tile.png
The tiled image used for the "film reel"
effect.
/usr/local/lib/igal2/directoryline2.html
The default file used to generate directory links in
index.html. If this file is changed, the index.html has to be regenerated by
running igal2 again.
All five files are copied to your image directory as dotfiles the first time you
run igal2. Modify the local copies (but keep their names) if you need
to further alter the appearance of your slide show (also see -t).
igal2 also checks for the existence of a $HOME/.igal2 directory
where users can store their own templates, overriding the site-wide
/usr/local/lib/igal2.
Run igal2 in a directory with jpg or gif images to see what
it does. Then play with the options described above and use -h if you
need a quick listing. Also see http://igal.trexler.at/ for online
examples.
There are always some. If you find any let me know. I don't have much time to
keep tweaking igal2 but if any major bugs pop up I probably ought to
fix them.
Eric Pop <epop@stanford.edu>, Wolfgang Trexler <wt-igal@trexler.at>
cjpeg, djpeg, pnmscale, identify, convert. If
they didn't come standard with your Linux distribution you can find them at
rpmfind.net (inside libjpeg and libgr-progs) and at
imagemagick.org, respectively. Also try www.ijg.org and
netpbm.sourceforge.net.
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